<template>
  <view>
    <!-- 使用搜索组件 -->
    <!--    <my-search :bgcolor="'#3C9EE7'" :radius="10"></my-search> -->
    <!--    <view class="search-box">
      <my-search @click="gotoSearch"></my-search> -->
    <view class="search-box">
      <my-search @click="gotoSearch"></my-search>
    </view>


    <view class="scroll-view-container">
      <!-- 左侧滚动视图 -->
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item',i===active?'active':'']" @click="changeActive(i)">
            {{item.cat_name}}
          </view>
        </block>
      </scroll-view>
      <!-- 右侧滚动视图 -->
      <scroll-view class="right-scroll-view" scroll-y="true" :style="{height:wh+'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="(item2,i2) in catelevel2" :key="i2">
          <view class="cate-lv2-title">
            / {{item2.cat_name}} /
          </view>
          <!-- 三级分类 -->
          <view class="cate-lv3-list">
            <!-- 三级分类的item项 -->
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
              <!-- 图片 -->
              <image :src="item3.cat_icon"></image>
              <!-- 文本 -->
              <text>
                {{item3.cat_name}}
              </text>
            </view>
          </view>
        </view>

      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'

  export default {
    mixins: [badgeMix],
    data() {
      return {
        wh: 0,
        // 分类列表数据
        cateList: [],
        active: 0,
        catelevel2: [],
        // 滚动条距离顶部的位置
        scrollTop: 0
      };
    },
    onLoad() {
      const res = uni.getSystemInfoSync()
      // console.log(res);
      this.wh = res.windowHeight - 50
      this.geiCateList()
    },
    methods: {
      async geiCateList() {
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/categories')
        console.log(res);
        if (res.meta.status !== 200) {
          return uni.$showMsg()
        }
        this.cateList = res.message
        this.catelevel2 = res.message[0].children
      },
      changeActive(i) {
        this.active = i
        this.catelevel2 = this.cateList[i].children
        // 让scrollTop在0和1之间切换
        this.scrollTop = this.scrollTop === 0 ? 1 : 0
      },
      gotoGoodsList(item3) {
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
        })
      },
      gotoSearch() {
        // console.log('ok');
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
  .scroll-view-container {
    display: flex;

    .left-scroll-view {
      width: 120px;

      .left-scroll-view-item {
        background-color: #F7F7F7;
        line-height: 60px;
        text-align: center;
        font-size: 12px;

        &.active {
          background-color: #FFFFFF;
          position: relative;

          &::before {
            content: ' ';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #C00000;
            position: absolute;
            top: 50%;
            left: 0;
            transform: translateY(-50%);
          }
        }
      }
    }
  }

  .right-scroll-view {
    background-color: #FFFFFF;

    .cate-lv2-title {
      font-size: 12px;
      font-weight: bold;
      text-align: center;
      padding: 15px 0;
    }

    .cate-lv3-list {
      display: flex;
      flex-wrap: wrap;

      .cate-lv3-item {
        width: 33.33%;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        margin-bottom: 10px;

        image {
          width: 60px;
          height: 60px;
        }

        text {
          font-size: 12px;
        }
      }
    }

    // .search-box {
    //   // 设置定位效果为"吸顶"
    //   position: sticky;
    //   // 吸顶的位置
    //   top: 0;
    //   // 提高层级,防止被轮播图覆盖
    //   z-index: 999;
    // }
  }
</style>